How long should GMM samples sit after the orbital shaker time is up and pressure is released?

The correct choice is based on the requirement for GMM (Gaseous Mass Measurement) samples to stabilize after being shaken and having the pressure released. Allowing the samples to sit for 10 minutes, plus or minus one minute, ensures that the materials settle properly and that any bubbles or disturbances caused by shaking have dissipated. This stabilization time is critical for obtaining accurate density measurements, as it allows the sample to reach a consistent state that reflects its true properties without interference from air bubbles or agitation.

This time frame is established in industry standards to balance the need for thorough mixing during the shaking process with the necessity of allowing the sample to achieve equilibrium. A duration shorter than this might result in inconsistent densities due to residual turbulence, while a longer wait could potentially lead to settling that does not accurately represent the sample as it would behave under normal conditions.